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Why does one need to study about soil and what is its importance?
You would be aware that, from the dawn of agriculture, cultivators were attracted to fertile soils of river valleys. Early Greek and Roman writers have described farming systems that involved leguminous plants, use of ashes and sulphur as soil su pplements. German chemist Justus von Liebig (1840) found that crop yields were increased by adding minerals to soils. He proposed that the mineral elements in the soil added as manures and fertilizers are essential for plant growth. According to him certain factors are essential for plant growth and if any one of these factors is limiting (controlling) plant production would be reduced. Soils are studied today to ascertain which of these factors is below desired level and how its limitation to plant growt h can be removed.
We mentioned earlier that pre-mating mechanisms are concerned with the prevention of occurrence of interspecific crosses. In such cases, a) the potential mates do not meet in wh
Define about the Centrifuge? Centrifuge is an apparatus consisting essentially of a compartment spun about a central axis to separate contained materials of different specific
PINEAL GLAND (EPIPHYSIS CEREBRI) - It develops from the ectoderm of the embryo. The pineal gland is located between the cerebral hemispheres, where it protrudes from the
(a) For any individual : · We should check house, doors and windows and have them repaired whenever necessary. · We shou
drawandlabelthemajorendocrineglandsinthehumanbody
Explain the Occurrence of vitamin B 2 Vitamin B 2 (riboflavin) occurs in nature almost exclusively in a combined form i.e. esterified with phosphoric acid as riboflavin-5'-ph
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Conventional Endodontic Treatment Surgical Endodontic & Retrograde sealing of Immature root Apex: After cleaning and shaping of the RC and before filling , I make a surgical
Of which type of defense cell do viral infections stimulate the multiplication? The major leukocytes that generally multiply and participate in the defense against viral infect
We now understand that mutations that cause the inhibition of apoptosis are found in tumours. Because proliferation itself is not induced by the inhibition of apoptosis, explain ho
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